Comparison

Complete Vocal Technique vs Razgah

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Complete Vocal Technique

Unlock your vocal potential with a comprehensive singing technique guide. Learn to reach higher, lower, longer, and faster notes healthily with practical tools, visuals, and sound examples. This app offers in-depth explanations of vocal anatomy and science for singers of all levels.

Highlights
  • Vocal technique explanations
  • Pedagogical illustrations and graphs
  • Extensive sound examples
  • Singing exercises
  • In-depth anatomy and physiology
  • Vocal mode control
  • Vocal effect training
Features
Read full description

The app contains the book in the following languages: English, Italian, and Chinese. Singing is not difficult - Everybody can learn how to sing! Unlock the sounds you want in your own voice with simple tools, visuals, sound examples and training tips. The Complete Vocal Technique app helps you reach higher, lower, longer, and faster notes in all volumes, pitches, and sound colours, with any vocal effect in a healthy manner. Complete Vocal Technique (CVT) is the world’s biggest singing technique and it has helped professional singers from all over the world for more than 25 years. CVT covers the latest and most innovative research in anatomy, physiology and voice science to secure that any singer can perform any desired sound in a healthy manner. With the Complete Vocal Technique app you get your own personal copy of the entire CVT system available at your fingertips. The app combines easily understandable explanations of vocal technique with pedagogical illustrations, graphs, and research to give quick, practical, and applicable solutions to any issue of the voice. All technical, theoretical and pedagogical explanations are supported by an extensive library of sound examples and singing exercises consisting of real life audio examples sung by professional singers. With the Complete Vocal Technique app you have access to all of this in the palm of your hand - in one app - that you can use wherever and whenever you need it.  The CVT app represents ground breaking approaches within vocal pedagogy, and helps professional as well as amateur singers reach new potential and solve problems in their voices. The app covers techniques for all styles of music, how to control the four vocal modes, speech techniques, mastering the various vocal effects - training all sounds in a healthy way. The app lets you unlock the sounds YOU want in your own voice with simple tools, visuals, and training tips, as well as offering in-depth descriptions of anatomy, physiology, and science. Complete Vocal Technique has been used in recording studios, on tours, and in concerts all over the world, and has quickly become an invaluable resource for countless of singers in their work with their voices. Complete Vocal Technique is developed by Cathrine Sadolin and she is continuously researching with ENT doctors, acoustical engineers, and other voice professionals from all over the world.

About

Razgah

Features
Read full description

Razgah is a non-profit site and is not affiliated with any group or organization. Our goal is to create a database of the Bible for the use of all Persian language users around the world. May this small service be in line with easy access to the contents and information of the Bible in Persian speaking countries.
This program makes it easier for users to access Bible information both online and offline.
Countries that do not have access to the Internet or their Internet is not fast enough, can use the offline program that does not require any Internet.
Razgah is a database of the Bible that is designed and compiled for the use of all Persian language users around the world. Razgah contains a wide range of useful sources of the Bible in order to be a safe and accessible method for Persian speakers to learn more about the contents of the Bible.
Therefore, the Secret Garden is a useful resource for all people at any stage of knowledge who want to know more about the contents of the Bible.
Razgah is based on the Bible and existing sources and is completely in Persian language to speed up the access of users to the contents of the Bible. In Razgah, there are four different translations of the Bible, which include the Old Translation, Commentary Translation, Translation of the Good News for the New Age (2023) and Sharif Translation, TOB's Translation, as well as the Book of Practical Commentary on the Old and New Testaments and Commentary on the Bible for Believers written by William Mack Donald is used.
The word finder in this program is a unique Persian tool to quickly search for words in different translations of the Bible.
Believers with any perspective should be aware of the passage of the history of the Bible from the Old Testament to the New Testament. Apocrypha and Sodapigrapha (forgotten books of Eden) help us to better understand the books of the Bible. In the translation of these two books, without adding anything to the original, an attempt has been made to make the composition of the text not only highly accurate but also provide better readability. These two books are also included in the online option of Razgah application.
In general, Razgah provides an environment for servants, students and other users so that they can access the information they need faster. In this regard, theological teachings and church rituals have also been made available to users. In fact, Razgah is an information center of the Bible in Persian, which is freely available to the public.

Screenshots

Complete Vocal Technique4 screens
Razgah4 screens

Verdict

The call

The clearest difference is price: Razgah at Free against Complete Vocal Technique's $64.99. Razgah also leads on update cadence (every 2 months vs every 5 months). Complete Vocal Technique's advantage is iOS requirement (13.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Razgah is free to download; Complete Vocal Technique costs $64.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Complete Vocal Technique ships an update every 5 months, Razgah every 2 months. The most recent releases landed on October 5, 2026 and September 30, 2026 respectively.

Scorecard3 real differences · 7 level
Complete Vocal Technique versus Razgah: the parameters behind the verdict, then further details
ParameterComplete Vocal TechniqueRazgah
Price$64.99Free — better
Rating4.8 (8 ratings) — better—
Positive reviews83.3% of reviews—
Number of ratings8 — better—
Update frequencyEvery 5 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size514 MB187 MB
Age rating12+4+
DeveloperComplete Vocal InstituteDavood Kazemian

In-app purchases

None

Complete Vocal Technique

No in-app purchases

None

Razgah

No in-app purchases

Questions

Is Complete Vocal Technique free?
Complete Vocal Technique costs $64.99, with no in-app purchases.
Is Razgah free?
Razgah is free to download, with no in-app purchases.
Do Complete Vocal Technique or Razgah have ads?
Neither Complete Vocal Technique nor Razgah shows ads.
Which is updated more often, Complete Vocal Technique or Razgah?
Complete Vocal Technique ships an update every 5 months, and Razgah every 2 months. Most recently, Complete Vocal Technique was updated on October 5, 2026 and Razgah on September 30, 2026.

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